4results about How to "Limit diffusion" patented technology

A brake caliper for a disc brake comprises: a caliper body having a first half caliper housing a first pad and a second half caliper housing a second pad; a thrust device configured to bias the first pad and the second pad against a brake disc, the first pad and the second pad comprising a plate and a friction lining, the plate comprising a rear surface and an opposite front surface, the rear surface being suitable to receive a thrust force from the thrust device, the friction lining being associated with the front surface, the thrust device being positioned facing the rear surface of the first pad, the first pad comprising a delivery hole extending through the plate between the front surface and the rear surface; a filter configured to retain and / or capture particulate matter, the first half caliper being formed with a housing compartment open in the direction of the rear surface of the plate of the first pad and facing the delivery hole, the filter being housed inside the housing compartment, the filter being positioned facing the rear surface and facing the delivery hole so that the filter is in communication with the delivery hole.

The invention discloses a gallium nitride device and a preparation method thereof, and relates to the technical field of semiconductor devices. The gallium nitride device comprises a sapphire substrate, an AlN nucleating layer, an N-type AlGaN buffer layer, an intrinsic AlGaN active layer, an electron blocking layer and a P-type AlGaN layer which are sequentially stacked from bottom to top, a gradient doping edge stop layer is arranged on the edge of the P-type AlGaN layer, and meanwhile a bottom electrode in ohmic contact with the N-type AlGaN buffer layer and a top electrode in ohmic contact with the P-type AlGaN layer are formed respectively. According to the invention, by optimizing the structural design of the substrate, the nucleating layer, the buffer layer, the active layer, the electron blocking layer, the edge termination layer and the electrode, and combining with the seagull optimization algorithm to accurately regulate and control the preparation process parameters, the comprehensive improvement of the light extraction efficiency, the carrier recombination efficiency, the breakdown voltage and the long-term working stability is realized; and the photoelectric property and the reliability of the gallium nitride device are obviously enhanced.

The utility model relates to cement conveying equipment technical field discloses a kind of bagged cement conveyer sealing collector, including conveying frame, the bottom of conveying frame is fixedly connected with two supports, the bottom of conveying frame is provided with collecting mechanism, collecting mechanism is used to collect bagged cement falling dust, the top of conveying frame is provided with sealing mechanism, sealing mechanism is used to cover the top of shading device Dust, collecting mechanism includes collecting groove, the top of collecting groove is fixedly connected in the bottom of conveying frame, the bottom of collecting groove is fixedly connected with collecting frame, the inboard of collecting frame is fixedly connected with cloth bag, the bottom of collecting frame is fixedly connected with two fans. In the utility model, bagged cement falls into collecting groove when conveying, collecting groove imports collecting frame with dust, collecting frame bottom fan starts negative pressure, dust is sucked into cloth bag filtration interception, limit dust dispersion pollution environment, improve operating environment cleanliness, reduce equipment maintenance cost.

The invention discloses a control method and system for mobile yarn ink-jet printing and dyeing, and relates to the technical field of textile ink-jet coloring. The method comprises the steps that the real-time moving speed of yarn is obtained; based on the real-time moving speed, setting a negative pressure value of an annular negative pressure trapping area coaxially surrounding the yarn and a flow rate of a circumferential rectification air curtain pointing to the yarn; and the air curtain is controlled to be matched with the ink jet action in time sequence so as to cooperate with the annular negative pressure capturing area to form a pneumatic window used for inhibiting flying ink in a jet printing near field. Through cooperative control of pneumatic parameters, the linear speed and the jet time sequence, high-quality ink jet printing and dyeing of the single yarn under the condition of high-speed movement are achieved.